OVERVIEW

This Trojan may be unknowingly downloaded by a user while visiting malicious websites.

It steals certain information from the system and/or the user.

It connects to certain websites to send and receive information. It deletes the initially executed copy of itself.

TECHNICAL DETAILS

File Size:

129,024 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

14 Feb 2017

Payload:

Collects system information, Downloads files

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting malicious websites.

Installation

This Trojan drops the following copies of itself into the affected system and executes them:

%User Startup%\Winslui.exe

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)

It is capable of downloading and executing files. As a result, malicious routines of the downloaded file(s) is exhibited on the affected machine.

It deletes the initially executed copy of itself

SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.220.04

FIRST VSAPI PATTERN DATE:

14 Feb 2017

VSAPI OPR PATTERN File:

13.221.00

VSAPI OPR PATTERN Date:

15 Feb 2017

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Search and delete these files

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There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result. %User Temp%\TMP{random}.tmp

To delete malware/grayware files:

For Windows 2000, Windows XP, and Windows Server 2003:

Right-click Start then click Search....

In the File name* input box, type%User Temp%\TMP{random}.tmp

In the Look In drop-down list, select My Computer then press Enter.

Once located, select the file then press SHIFT+DELETE to delete it.

Repeat the said steps for all files listed.*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

Repeat the said steps for all files listed. *Note: Read the following Microsoft page if these steps do not work on Windows 7.

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_RATANKBA.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.